Calculating-machine.



V. VOGEL.

UALGULATING- MACHINE.

APPLIUATION FILED 1320.11, 1909.

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V. VOGEL.

CALGULATING MACHINE.

APPLIGATION FILED 11110.11, 1909.

Patented Dec. 19, 1911.

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VICTOR VOGEL, F RIGA, RUSSIA.

CALCULATING-MACHINE.

Specification of Letters Patent.

Patented Dec. 19, 1911.

Application led December 11, 1909. Serial No. 532,573.

To all whom it may concern:

Be it known that I, VICTOR VOGEL, a subject of the Czar of Russia, and aresident of Riga, Russia, have invented a new and ImprovedCalculating-Machine, of which the following is a full, clear, and exactdescription.

This invention relates to calculating machines, and more particularly tocalculating machines having an indicating device, and a spiral memberoperatively connected with the same and constituting the' actuatingagency for the indicating device, the spiral member being adapted to beactuated by a member movable in the direction of the length of thespiral member and in engagement therewith, means being provided forguiding the member which is used to operate the spiral member.

The object of the invention is to-provide improvements in calculatingmachines having spiral actuating members and registering devices, bymeans of which a pointer or other member used to operate the spiral isguided so that its act-ion is positive, and the danger of having themember slip or become displaced is obviated, in which the guiding meansare operable when the machine is used for addition as well as forsubtraction, which are simple and inexpensive, and which can be appliedto different forms of calculating machines of the abovedescribed type.

The invention consists in the construction and combination of parts tobe more fully described hereinafter and particularly set forth in theclaims.

Reference is to be had to the accompanying drawings forming a part ofthis specification, in which similar characters of reference indicatecorresponding parts in all the views, and in which- Figure 1 is atransverse section of a calculating machine having an embodiment of myinvention applied thereto; Fig. 2 is a plan view of the machine; Fig. 3is a similar view showing one of the parts in a different position; Fig.4 is a side elevation of the machine; and Fig. 5 is a plan view of themachine with part of the casing removed to show the connection betweenthe indicating devices and the spirals.

Before proceeding to a more detailed eX- planation of my invention, itshould be clearly understood that the same is intended for use withdifferent forms of calculating machines in which the registering devicesare actuated or cont-rolled by members having spira] guide ribs, groovesor the like, and which are mounted to rotate, so that when a pointer orother member is brought into engagement therewith and forced in thedirection of the length of a spiral member, that is, axially withrespect thereto, the spiral member is caused to rotate and thereby serveto actuate its registering device. An example of this type ofcalculating machine is shown for instance, in the German PatentNo.112,230. I have found that the operating member, that is, the pointeror like device, when brought into engagement with a coil of the spiralat the side of the same, and moved in the direction of the length of thespiral, is apt to slip from engagement, as it is not constrained to movein one direction. for calculating rapidly, this fact is liable to causeconsiderable inconvenience and loss of time and labor. I thereforeprovide means for guiding the pointer or other actuating member, as willappear more clearly hereinafter. I have also found that in calculatingmachines of the above-mentioned type now in use, it is necessary toemploy the same side of the spiral member for addition as well as forsubtraction, and difculty is found in properly reading the numbers, onerow ofv which serves for addition and the other row for subtraction, sothat Vconsiderable possibility of error obtains. To avoid thisdifficulty I have so improved the machine that both sides of the spiralsare available for engagement by the pointer or actuating member, as willappear more clearly hereinafter.

Referring more particularly t'o the drawings, I provide a frame orcasing 10 in which are mounted the indicating devices 10a. These presentfigures, which are visible through sight openings 1l 0f the casing,

are of any suitable kind adapted for the purpose. They are actuated byspiral members a mounted to rotate, and which, as shown for example,herewith, may consist of helices, formed from wire or the like.

The members a are connected with the indicating devices by means ofsuitable mechanism 10b. Each spiral member is located in a guide channelhaving Walls ZJ, c, and el, arranged at both sides of the spiral andunderneath the same. These guide channels have the Walls arrangedclosely adjacent to the When the machine is used CII spiral members, butdo not in any way interfere with the rotation thereof.

A cover c is movably mounted upon the casing, for example in guides l2.The cover e has a button 7) by means of which it can be slidablymanipulated. Its movement may be limited by suitable stops. The coverhas slots g so arranged that` in predetermined positions of the covereach slot disclosesone sideor the other of one of the spiral members, asis shown in Figs. 2 and 3. The face of the casing at each side of eachof the spiral members has indicated thereon series of numerals whichconsist of the numbers from l to 9 inclusive. It also has indicatedthereon for example, the words Addition and Subtraction one of which isconcealed in each position of the cover.

A suitable, spiral-actuating member f is employed in connection with thecalculating machine, and is inserted lthrough one of the slots g so thatit can be brought into operative engagement with the correspondingspiral member. It is provided with a handle L by means of which it canbe manipulated. It will be understood that owing to the provision of theguide channels as well as of the slotted cover, the actuating member fisso guided that it cannot slip, the only possible movement of which itis capable other than one longitudinally of the axis of the spiralmember, being a movement out-V ward, through the slot, and as thepressure of the hand tends to force it into the slot, the impossibilityof accidental displacement of the member is quite obvious.

Having thus described my invent-ion, I claim `as new, and desire tosecure by Letters Patent:

1. In a calculating machine having a cas-4 channel and adapted to beactuated by a movable member, 'and an indicating device operativelyassociated with said spiral, of a cover movably mounted upon said casingand adapted to extend over either side of said spiral, in accordancewith the position of said cover, whereby a spiral-actuating member canbe brought into engagement with either side .of said spiral, said coverserving as guiding means for said spiralactuating member.

3. The combination, with a casing having a channel, a spiral rotatablymounted in said channel andadapted to be actuated by a movable member,and an indicating device operatively associated with said spiral, of acover movably mounted upon said casing and adapted to extend over eitherside of said spiral, in accordance with the position of said cover,whereby a spiral-actuating member can be brought into engagement witheither side of said spiral, said cover serving as guiding means for saidspiralactuating member, said casing having series of figures indicatedthereon at each side of said spiral and serving to coperate with thelatter when the calculating machine is used respectively, for additionand subtraction, said cover in each of its positions concealing oneofsaid series of igures.

4. In a calculating machine having a plurality of rotatable spirals,registering devices operatively associated with said spirals, a movablecover having a plurality of slots each adapted to disclose one side ofone of said spirals in a predetermined position of said cover, and todisclose the other side of said spiral in lanother predeterminedposition of said cover, said slots serving to guide a spiral-actuatingmember, said cover having means whereby it can be manipulated.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

VICTOR VOGEL. lVitnesses:

N. HARTMANN, EDMUND NEWGEBAUER.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents,

Washington, D. C.

